@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
:root{
  --navy:#283C8C;
  --navy-deep:#1f2e6e;
  --blue:#3C78B4;
  --cyan:#64C8C8;
  --ink:#0f172a;
  --slate:#475569;
  --muted:#94a3b8;
  --line:#e2e8f0;
  --cloud:#f1f5f9;
  --mist:#f8fafc;
  --white:#ffffff;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.05);
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px rgba(15,23,42,.12);
}
*{box-sizing:border-box;}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
a{color:inherit;text-decoration:none;}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1);}
.reveal.in{opacity:1;transform:none;}
.reveal[data-d="1"]{transition-delay:.08s;}
.reveal[data-d="2"]{transition-delay:.16s;}
.reveal[data-d="3"]{transition-delay:.24s;}
.reveal[data-d="4"]{transition-delay:.32s;}
.reveal[data-d="5"]{transition-delay:.4s;}
.reveal[data-d="6"]{transition-delay:.48s;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}.anim-none{animation:none!important;}}

/* ===== 顶部导航 ===== */
/* 默认全透明（首屏无底色），滚动后切换为白色实底，保证可读性 */
.site-nav{position:fixed;inset:0 0 auto 0;z-index:50;background:transparent;border-bottom:1px solid transparent;transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;height:72px;}
.site-nav.scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:var(--shadow-sm);}
.site-nav .nav-inner{max-width:1280px;margin:0 auto;height:72px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;}
.nav-logo{display:flex;align-items:center;gap:10px;}
.nav-logo img{height:38px;width:auto;}
.nav-links{display:none;align-items:center;gap:6px;}
@media(min-width:768px){.nav-links{display:flex;}}
.nav-link{position:relative;padding:8px 14px;font-size:14px;font-weight:500;color:var(--slate);border-radius:8px;transition:color .25s ease,background .25s ease;}
.nav-link:hover{color:var(--navy);background:var(--mist);}
.nav-link.active{color:var(--navy);}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--cyan);}
.nav-cta{display:none;}
@media(min-width:768px){.nav-cta{display:inline-flex;}}
.en-btn{font-size:12px;font-weight:700;color:#fff;background:var(--navy);padding:7px 14px;border-radius:999px;transition:background .25s ease,transform .25s ease;}
/* 中英切换按钮 */
.lang-switch{display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:700;color:var(--navy);background:rgba(60,120,180,.10);border:1px solid rgba(60,120,180,.28);padding:6px 12px;border-radius:999px;transition:background .25s ease,color .25s ease;}
.lang-switch:hover{background:var(--navy);color:#fff;}
.lang-switch iconify-icon{font-size:16px;}
.en-btn:hover{background:var(--navy-deep);transform:translateY(-1px);}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;color:var(--ink);background:var(--mist);}
@media(min-width:768px){.nav-toggle{display:none;}}

/* 产品下拉 */
.prod-drop{position:fixed;left:50%;top:72px;transform:translateX(-50%) translateY(8px);width:min(1120px,96vw);background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:60;overflow:hidden;}
.prod-drop.open{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.prod-body{display:grid;gap:24px;padding:24px 26px;}
@media(min-width:768px){.prod-body{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}}
.prod-col h4{font-size:13px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px;padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid var(--line);}
/* 桌面端一行 5 列，全部产品一屏展示；窄屏自动折行 */
.prod-items{display:grid;gap:14px;grid-template-columns:repeat(2,1fr);}
@media(min-width:768px){.prod-items{grid-template-columns:repeat(5,1fr);}}
@media(min-width:768px) and (max-width:1279px){.prod-items{grid-template-columns:repeat(3,1fr);}}
/* 产品卡片：上图为大、下为文字 */
.prod-drop .prod-col a.sub{display:flex;flex-direction:column;gap:0;padding:0;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;}
.prod-drop .prod-col a.sub:hover{border-color:rgba(60,120,180,.5);transform:translateY(-3px);box-shadow:0 12px 26px rgba(40,60,140,.14);}
/* 产品缩略图（源图已按 16:9 完整合成，无裁切、无白边） */
.prod-drop .prod-col a.sub .thumb{width:100%;height:auto;aspect-ratio:16/9;flex:none;overflow:hidden;
  display:flex;align-items:center;justify-content:center;background:#fff;color:var(--navy);}
.prod-drop .prod-col a.sub .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s cubic-bezier(.22,1,.36,1);}
.prod-drop .prod-col a.sub:hover .thumb img{transform:scale(1.04);}
.prod-drop .prod-col a.sub .meta{display:flex;flex-direction:column;gap:2px;min-width:0;padding:10px 11px 11px;flex:1 1 auto;}
/* 中文标题单行省略；英文标题固定两行高度，保证 5 张卡片图文对齐 */
.prod-drop .prod-col a.sub .t{font-size:12.5px;font-weight:700;color:var(--ink);line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.7em;}
.prod-drop .prod-col a.sub:hover .t{color:var(--navy);}
.prod-drop .prod-col a.sub .e{font-size:9.5px;color:var(--muted);line-height:1.3;letter-spacing:.03em;text-transform:uppercase;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.prod-foot{border-top:1px solid var(--line);padding:14px 26px;text-align:center;}
@media(max-width:767px){
  .prod-drop{width:94vw;top:68px;max-height:calc(100vh - 88px);overflow-y:auto;}
  .prod-body{padding:18px 18px 6px;gap:18px;}
  .prod-items{gap:10px;}
  .prod-drop .prod-col a.sub .meta{padding:9px 11px 11px;}
  .prod-drop .prod-col a.sub .t{font-size:12.5px;}
  .prod-drop .prod-col a.sub .e{font-size:9.5px;}
}

/* 移动菜单 */
/* 移动端菜单：固定面板贴在导航下沿（原为文档流内元素，展开时首项「首页」被固定导航的 LOGO 压住） */
.mobile-menu{display:none;position:fixed;left:0;right:0;top:72px;z-index:49;flex-direction:column;gap:2px;
  padding:16px 20px 22px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  max-height:calc(100vh - 72px);overflow-y:auto;-webkit-overflow-scrolling:touch;}
.mobile-menu.open{display:flex;}
.mobile-menu a{padding:12px 8px;font-size:15px;font-weight:500;color:var(--slate);border-radius:10px;}
.mobile-menu a:hover{background:var(--mist);color:var(--navy);}
.mobile-menu .m-group-title{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:14px 8px 6px;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;padding:13px 26px;border-radius:12px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;cursor:pointer;border:1px solid transparent;line-height:1;}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 8px 20px rgba(40,60,140,.25);}
.btn-primary:hover{background:var(--navy-deep);transform:translateY(-2px);box-shadow:0 12px 28px rgba(40,60,140,.32);}
.btn-ghost{background:#fff;color:var(--navy);border-color:var(--line);}
.btn-ghost:hover{background:var(--mist);border-color:var(--navy);transform:translateY(-2px);}
.btn-cyan{background:var(--cyan);color:#06343a;box-shadow:0 8px 20px rgba(100,200,200,.3);}
.btn-cyan:hover{transform:translateY(-2px);filter:brightness(1.04);}
.btn-sm{padding:9px 18px;font-size:13px;border-radius:10px;}

/* ===== 标签 / 胶囊 ===== */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;background:var(--mist);color:var(--navy);border:1px solid var(--line);}
/* 新闻卡片（首页） */
.nw-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
@media(max-width:1100px){.nw-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:720px){.nw-grid{grid-template-columns:1fr;}}
.nw-tag{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px;background:rgba(60,120,180,.1);color:var(--blue);align-self:flex-start;}
.nw-title{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;margin:14px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease;}
.card:hover .nw-title{color:var(--navy);}
.nw-sum{font-size:13px;color:var(--slate);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
/* 新闻列表（横向行卡片） */
.news-row{display:flex;gap:28px;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;margin-bottom:24px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;}
.news-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(60,120,180,.35);}
.news-row-img{width:280px;min-height:196px;flex:none;background:linear-gradient(135deg,#eef3fb,#dbe6f7);overflow:hidden;}
.news-row-img img{width:100%;height:100%;object-fit:cover;display:block;}
.news-row-ph{width:100%;height:100%;min-height:196px;display:flex;align-items:center;justify-content:center;color:var(--navy);}
.news-row-body{flex:1;padding:24px 28px 22px 0;display:flex;flex-direction:column;min-width:0;}
.news-row-meta{display:flex;align-items:center;gap:14px;font-size:13px;}
.news-row-meta .date{color:var(--muted);}
.news-row-meta .cat{display:inline-flex;font-size:12px;font-weight:600;padding:3px 10px;border-radius:6px;background:rgba(34,170,110,.1);color:#16a34a;}
.news-row-title{font-size:19px;font-weight:700;color:var(--ink);line-height:1.5;margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease;}
.news-row:hover .news-row-title{color:var(--navy);}
.news-row-sum{font-size:14px;color:var(--slate);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-row-more{margin-top:auto;padding-top:14px;display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:600;color:var(--blue);}
.news-row:hover .news-row-more{color:var(--navy);}
@media(max-width:760px){
  .news-row{flex-direction:column;gap:0;}
  .news-row-img{width:100%;min-height:0;height:200px;}
  .news-row-body{padding:20px 20px 22px;}
}
.pill-cyan{background:rgba(100,200,200,.14);color:#0c5b61;border-color:rgba(100,200,200,.35);}
.kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);margin-bottom:14px;}
.section-title{font-size:clamp(26px,3.4vw,40px);font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.15;}
.section-desc{color:var(--slate);font-size:15px;line-height:1.7;max-width:640px;}

/* ===== 卡片 ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:18px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cdd9f0;}

/* ===== 页面 Banner ===== */
/* 内页 Banner：去掉蓝色渐变蒙版，直接露出原图（原图左侧留白），文字改用深色 */
.banner{position:relative;overflow:hidden;padding:140px 0 70px;background-color:#f4f6f9;}
.banner.has-img{background-size:cover;background-position:center;background-color:#f4f6f9;}
.banner .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;pointer-events:none;}
.banner .inner{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:0 20px;}
.banner .b-sub{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--blue);}
.banner .b-title{font-size:clamp(32px,4.6vw,54px);font-weight:800;color:var(--navy-deep);letter-spacing:-.02em;margin:10px 0 12px;line-height:1.1;}
.banner .b-desc{color:var(--slate);font-size:16px;max-width:620px;line-height:1.7;}

/* 产品中心页 Banner（内联 class 体系，兼容同一套浅色文字方案） */
.page-banner{position:relative;overflow:hidden;padding:140px 0 70px;background-color:#f4f6f9;background-size:cover;background-position:center;}
.page-banner .banner-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:0 20px;}
.page-banner .banner-sub{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--blue);}
.page-banner h1.banner-title,.page-banner .text-white{color:var(--navy-deep)!important;}
.page-banner .glow-text{text-shadow:none!important;}
.page-banner .banner-desc{color:var(--slate);font-size:16px;max-width:620px;line-height:1.7;}

/* ===== 表单 ===== */
.field{width:100%;padding:13px 16px;border:1px solid var(--line);border-radius:12px;font-size:15px;color:var(--ink);background:#fff;outline:none;transition:border-color .2s ease,box-shadow .2s ease;}
.field:focus{border-color:var(--navy);box-shadow:0 0 0 4px rgba(40,60,140,.1);}
.field-label{font-size:13px;font-weight:600;color:var(--slate);margin-bottom:7px;display:block;}
.alert-ok{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#15803d;border-radius:14px;padding:18px 22px;}
.alert-err{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.3);color:#b91c1c;border-radius:14px;padding:14px 18px;font-size:14px;}

/* ===== 联系页两栏 ===== */
.contact-cols{display:grid;grid-template-columns:5fr 6fr;gap:40px;align-items:start;}
@media (max-width:900px){.contact-cols{grid-template-columns:1fr;gap:32px;}}
@media (max-width:900px){[style*="about-cols"],.about-cols{grid-template-columns:1fr !important;gap:36px !important;}}
/* ===== 关于页简介两栏（左文右图） ===== */
.about-intro{display:grid;grid-template-columns:1.15fr 1fr;gap:48px;align-items:center;}
@media (max-width:900px){.about-intro{grid-template-columns:1fr;gap:36px;}}

/* ===== 产品详情组件 ===== */
/* 顶部 Hero：改为浅底（原来深蓝渐变导致透明导航深灰文字看不见），文字改深色 */
.pd-hero{position:relative;overflow:hidden;padding:120px 0 64px;background:#f4f6f9;}
.pd-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center right;
  background-repeat:no-repeat;opacity:.22;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.3) 38%,#000 66%);
  mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.3) 38%,#000 66%);}
.pd-hero-bg::after{content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,#f4f6f9 0px,rgba(244,246,249,.92) 54px,rgba(244,246,249,0) 128px),
    linear-gradient(90deg,#f4f6f9 0%,rgba(244,246,249,.85) 34%,rgba(244,246,249,.30) 54%,rgba(244,246,249,.06) 78%);}
.pd-crumb{display:flex;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap;gap:0 8px;align-items:center;}
.pd-crumb a{color:var(--slate);}
.pd-crumb a:hover{color:var(--navy);}
.pd-crumb .cur{color:var(--ink);font-weight:600;}
.pd-pill{background:rgba(60,120,180,.10);color:var(--blue);border-color:rgba(60,120,180,.28);}
.pd-title{font-size:clamp(30px,4vw,46px);font-weight:800;color:var(--navy-deep);letter-spacing:-.02em;margin:14px 0 12px;line-height:1.12;}
.pd-sub{font-size:17px;font-weight:400;color:var(--slate);max-width:560px;line-height:1.55;}
.pd-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center;padding:16px 0;}
.pd-media{display:flex;flex-direction:column;align-items:center;}
@media(min-width:880px){
  .pd-grid{grid-template-columns:1.05fr .95fr;}
  .pd-media{align-items:flex-end;}
  .pd-media .main-img{width:100%;max-width:420px;height:auto;aspect-ratio:1/1;}
}
/* 窄屏：背景图不压在文字下，整体淡化 */
@media(max-width:879px){
  .pd-hero{padding:104px 0 40px;}
  .pd-title{font-size:clamp(26px,6.4vw,34px);}
  .pd-sub{font-size:15.5px;}
  .pd-hero-bg{opacity:.28;background-position:center 30%;
    -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.45) 0%,transparent 62%);
    mask-image:linear-gradient(180deg,rgba(0,0,0,.45) 0%,transparent 62%);}
  .pd-hero-bg::after{background:linear-gradient(180deg,rgba(244,246,249,.55) 0%,rgba(244,246,249,.88) 45%,#f4f6f9 70%);}
}
.main-img{width:340px;height:340px;max-width:100%;border-radius:20px;overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);}
.main-img img{width:100%;height:100%;object-fit:contain;}
.thumb-row{display:flex;gap:8px;margin-top:14px;justify-content:center;}
/* 注意：这里的 .thumb 是产品详情页小图切换器，必须限定在 .thumb-row 内，
   否则会污染导航下拉里的 .prod-col a.sub .thumb 尺寸 */
.thumb-row .thumb{width:54px;height:54px;border-radius:10px;overflow:hidden;border:2px solid transparent;cursor:pointer;background:#fff;display:flex;align-items:center;justify-content:center;opacity:.6;transition:all .2s;}
.thumb-row .thumb:hover{opacity:.9;}
.thumb-row .thumb.active{border-color:var(--cyan);opacity:1;}
.thumb-row .thumb img{width:100%;height:100%;object-fit:cover;}
.tab-bar{position:sticky;top:72px;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.tab-bar .inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;gap:4px;}
.tab-btn{position:relative;padding:16px 22px;font-size:14px;font-weight:600;color:var(--slate);background:none;border:none;cursor:pointer;transition:color .2s;}
.tab-btn::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:0;height:2px;border-radius:2px;background:var(--cyan);transition:width .25s;}
.tab-btn:hover{color:var(--ink);}
.tab-btn.active{color:var(--navy);}
.tab-btn.active::after{width:60%;}
.tab-panel{display:none;}
.tab-panel.active{display:block;animation:fadeUp .4s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.feature-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);align-items:flex-start;}
.feature-row:last-child{border-bottom:none;}
.feature-row .dot{width:9px;height:9px;border-radius:50%;background:var(--cyan);margin-top:7px;flex:none;}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;}
.spec-table tr{border-bottom:1px solid var(--line);}
.spec-table tr:last-child{border-bottom:none;}
.spec-table td{padding:13px 16px;vertical-align:middle;}
.spec-table td:first-child{width:200px;font-weight:600;color:var(--slate);background:var(--mist);}
.prose-c{font-size:15px;line-height:1.85;color:var(--slate);}
.prose-c h3{font-size:18px;font-weight:700;color:var(--ink);margin:26px 0 12px;}
.prose-c p{margin-bottom:12px;}
.prose-c ul{list-style:disc;padding-left:20px;margin-bottom:12px;}
.prose-c ul li{margin-bottom:4px;}
.article-body{font-size:16px;line-height:1.9;color:var(--slate);}
.article-body h2,.article-body h3,.article-body h4{color:var(--ink);font-weight:700;margin:28px 0 12px;line-height:1.35;}
.article-body img{max-width:100%;border-radius:14px;margin:10px 0;}

/* ===== 页脚 ===== */
.site-footer{background:var(--mist);border-top:1px solid var(--line);color:var(--slate);}
.site-footer .inner{max-width:1280px;margin:0 auto;padding:64px 20px 32px;}
.site-footer h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:20px;}
.site-footer a:hover{color:var(--navy);}
.site-footer .copy{border-top:1px solid var(--line);padding-top:24px;margin-top:40px;font-size:13px;color:var(--muted);}
.footer-cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;align-items:start;}
.footer-cols > div:first-child p{max-width:420px;}
@media (max-width:960px){.footer-cols{grid-template-columns:1fr 1fr;gap:36px;}}
@media (max-width:560px){.footer-cols{grid-template-columns:1fr;gap:30px;}}
.fab{position:fixed;right:22px;bottom:22px;z-index:50;display:flex;flex-direction:column;gap:12px;}
.fab button,.fab a{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);transition:transform .2s,background .2s,color .2s;color:#fff;background:var(--navy);}
.fab button:hover,.fab a:hover{transform:translateY(-3px);background:var(--navy-deep);}

/* 回到顶部 */
#backTop{opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;}
#backTop.show{opacity:1;visibility:visible;}

/* 容器辅助 */
.wrap{max-width:1280px;margin:0 auto;padding:0 20px;}
.section{padding:88px 0;}
.section.alt{background:var(--mist);}
@media(max-width:640px){.section{padding:60px 0;}.banner{padding:120px 0 56px;}}

/* 统计块 */
.stat-num{font-size:clamp(30px,4vw,44px);font-weight:800;color:var(--navy);line-height:1;letter-spacing:-.02em;}
.divider{height:1px;background:var(--line);border:none;}

/* 空态 */
.empty-state{text-align:center;padding:70px 20px;color:var(--muted);}
.empty-state .ico{font-size:54px;color:var(--line);}

/* ===== 首页 Hero（轮播，左文右图） ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,var(--navy) 0%,var(--blue) 55%,var(--cyan) 135%);padding:132px 0 84px;}
.hero .blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.45;pointer-events:none;}
.hero-slide{display:none;}
.hero-slide.active{display:block;animation:fadeUp .5s ease;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:32px;}}
.hero-eyebrow{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.82);}
.hero-title{font-size:clamp(34px,4.8vw,58px);font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.08;margin:14px 0;}
.hero-sub{font-size:clamp(17px,2vw,22px);font-weight:300;color:rgba(255,255,255,.92);line-height:1.5;}
.hero-desc{color:rgba(255,255,255,.82);font-size:15px;line-height:1.8;margin-top:14px;max-width:520px;}
.hero-card{width:100%;aspect-ratio:4/3;border-radius:26px;overflow:hidden;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);box-shadow:var(--shadow-lg);}
.hero-card img{width:100%;height:100%;object-fit:cover;}
.hero-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap;}
.hero-stats .hs b{display:block;font-size:24px;font-weight:800;color:#fff;}
.hero-stats .hs span{font-size:12px;color:rgba(255,255,255,.78);}
.hero-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s;z-index:5;}
.hero-nav:hover{background:rgba(255,255,255,.34);}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5;}
.hero-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s;}
.hero-dot.active{background:#fff;width:26px;border-radius:6px;}

/* 业务板块卡 */
.biz-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:#cdd9f0;}
.biz-media{aspect-ratio:2/1;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#eef3fb,#dbe6f7);}
.biz-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.biz-card:hover .biz-media img{transform:scale(1.06);}

/* 行业应用卡 */
.app-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .35s ease,box-shadow .35s ease;}
.app-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.app-media{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#eef3fb,#dbe6f7);position:relative;}
.app-media img{width:100%;height:100%;object-fit:cover;}
.app-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,23,42,.18);}
.app-play .circle{width:56px;height:56px;border-radius:50%;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(40,60,140,.3);transition:transform .4s;}
.app-card:hover .app-play .circle{transform:rotate(180deg) scale(1.08);}

/* 深色数据带 */
.band-dark{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy-deep),var(--navy) 60%,var(--blue));}
.band-dark .grid-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
@media(min-width:640px){.band-dark .grid-stats{grid-template-columns:repeat(3,1fr);}}
@media(min-width:1024px){.band-dark .grid-stats{grid-template-columns:repeat(6,1fr);}}
.stat-box{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:24px;text-align:center;}
.stat-box .n{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:#fff;line-height:1;}
.stat-box .u{font-size:13px;color:rgba(255,255,255,.75);margin-top:8px;}

/* 产品中心轮播 */
.pc-track{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:4px;}
.pc-track::-webkit-scrollbar{display:none;}
.pc-item{flex:0 0 calc((100% - 72px)/4);scroll-snap-align:start;display:block;}
.pc-nav{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--navy);font-size:20px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px rgba(40,60,140,.08);}
.pc-nav:hover{background:var(--navy);color:#fff;border-color:var(--navy);}
.pc-dot{width:8px;height:8px;border-radius:99px;border:none;background:var(--line);cursor:pointer;transition:all .25s ease;padding:0;}
.pc-dot.on{width:24px;background:var(--navy);}
@media (max-width:1100px){.pc-item{flex:0 0 calc((100% - 24px)/2);}}
@media (max-width:720px){.pc-item{flex:0 0 100%;}}

/* ============================================================
   首页 DBS 风格排版（2026-09-20）
   浅灰画布 + 超大字号叠压 + 玻璃数据块 + Bento 网格
   ============================================================ */
.hm{--hm-canvas:#eceded;--hm-ink:#0d0d0f;--hm-sub:#8a8a90;--hm-line:rgba(15,15,20,.08);--hm-r:18px;}
.hm-wrap{max-width:1240px;margin:0 auto;padding:0 40px;}
@media(max-width:640px){.hm-wrap{padding:0 20px;}}

/* ---------- Hero ---------- */
.hm-hero{background:var(--hm-canvas);position:relative;overflow:hidden;}
.hm-hero-inner{position:relative;min-height:inherit;}
.hm-hero-inner[hidden]{display:none;}
/* 栅格只承载左栏文字；右栏图片绝对定位出血压满右半屏，避免露出灰边 */
.hm-hero-grid{display:block;min-height:min(78vh,660px);max-width:1400px;margin:0 auto;padding:0 40px;position:relative;}
/* 左内边距 28px：避开左侧垂直居中的轮播箭头（箭头占 14→58px），避免压住「重构工业未来」等文字 */
.hm-hero-left{display:flex;flex-direction:column;justify-content:center;padding:104px 0 96px 28px;max-width:628px;position:relative;z-index:3;}
.is-en .hm-hero-left{max-width:688px;}
.hm-mark{font-size:12.5px;letter-spacing:.22em;color:#a9a9b0;font-weight:600;margin-bottom:22px;}
/* 标题：上限从 116px 降到 78px，宽屏不再一行占满左栏 */
.hm-h1{font-size:clamp(40px,4.6vw,78px);line-height:1.0;font-weight:800;letter-spacing:-.032em;color:var(--hm-ink);margin:0;}
.is-en .hm-h1{font-size:clamp(30px,3.9vw,60px);line-height:1.06;letter-spacing:-.025em;}
.hm-h1 .thin{color:#c6c6cc;}
.hm-rule{width:56px;height:3px;background:#c9c9ce;margin:22px 0 28px;}
.hm-eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#b0b0b6;font-weight:600;margin-bottom:10px;}
.hm-sub{font-size:clamp(17px,1.6vw,23px);color:#5f5f66;font-weight:600;letter-spacing:-.01em;margin:0;}
.hm-desc{font-size:14px;color:var(--hm-sub);line-height:1.85;margin-top:14px;max-width:420px;}
/* 右栏：出血压到视口右边缘、上下顶满 */
.hm-hero-right{position:absolute;top:0;right:0;bottom:0;left:54%;z-index:1;overflow:hidden;}
.hm-hero-right::before{content:"";position:absolute;left:0;top:0;bottom:0;width:32%;z-index:2;pointer-events:none;
  background:linear-gradient(90deg,var(--hm-canvas) 6%,rgba(236,237,237,0) 100%);}
.hm-hero-right img{width:100%;height:100%;max-width:none;max-height:none;object-fit:cover;object-position:var(--hm-focus,right 32%);display:block;}
.hm-hero-fallback{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#c0c0c6;}
.hm-hero-fallback iconify-icon{font-size:180px;}

/* 玻璃数据块 */
.hm-stats{display:flex;gap:14px;flex-wrap:wrap;margin-top:44px;}
.hm-stat{min-width:122px;padding:16px 20px;border-radius:14px;background:rgba(255,255,255,.62);
  -webkit-backdrop-filter:blur(16px) saturate(150%);backdrop-filter:blur(16px) saturate(150%);
  border:1px solid rgba(255,255,255,.75);box-shadow:0 8px 26px rgba(20,25,45,.09);}
.hm-stat b{display:block;font-size:clamp(19px,2.3vw,27px);font-weight:800;color:var(--hm-ink);letter-spacing:-.025em;line-height:1.1;}
.hm-stat span{display:block;font-size:11px;color:#9a9aa1;margin-top:5px;letter-spacing:.03em;}
/* 圆点导航与左栏文字同轴（跟随上面文字右移的 28px） */
.hm-slide-nav{position:absolute;bottom:34px;left:max(68px,calc((100% - 1400px)/2 + 68px));display:flex;gap:8px;z-index:5;}
.hm-dot{width:26px;height:3px;border-radius:2px;background:rgba(15,15,20,.16);border:0;cursor:pointer;padding:0;transition:background .25s,width .25s;}
.hm-dot.on{background:var(--hm-ink);width:40px;}
.hm-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:1px solid var(--hm-line);
  background:rgba(255,255,255,.55);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:#3a3a42;z-index:4;transition:background .2s;}
.hm-arrow:hover{background:#fff;}

/* ---------- 宣言段 ---------- */
.hm-manifesto{padding:100px 0 88px;text-align:center;background:#fff;}
.hm-mini{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:#bcbcc2;font-weight:700;}
.hm-manifesto .lead{font-size:clamp(15px,1.75vw,20px);color:#3a3a42;font-weight:600;line-height:1.75;max-width:760px;margin:20px auto 0;letter-spacing:-.005em;}
.hm-manifesto .fine{font-size:clamp(13px,1.35vw,15px);color:#b3b3ba;line-height:1.9;max-width:660px;margin:22px auto 0;}

/* ---------- Bento 网格（单行四栏：大图 / 参数 / 双数据卡+图 / 竖图） ---------- */
.hm-bento-sec{background:#fff;padding:0 0 100px;}
.hm-bento{display:grid;grid-template-columns:28fr 22fr 32fr 18fr;gap:14px;}
.hm-cell{position:relative;border-radius:var(--hm-r);overflow:hidden;background:#f4f4f5;
  transition:transform .35s cubic-bezier(.2,.7,.3,1),box-shadow .35s;}
a.hm-cell:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(20,25,45,.1);}
.hm-b1,.hm-b2,.hm-b3,.hm-b4{min-height:400px;}

/* ---------- 全宽主图卡（四栏上方一排）：原大图卡回归，仅去掉大号标题 ---------- */
.hm-wide{grid-column:1/-1;min-height:280px;height:280px;background:#2a2d33;}
.hm-wide::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,14,28,.44) 0,rgba(10,14,28,0) 30%,rgba(10,14,28,0) 58%,rgba(10,14,28,.55) 100%);}
/* 卡内文字：左上产品名/副标题 + 左下说明（原 .hm-a 的写法，作用域限定在 .hm-wide） */
.hm-wide .hm-corner{position:absolute;top:20px;left:24px;right:24px;z-index:4;}
.hm-wide .hm-corner .nm{font-size:17px;font-weight:700;color:#fff;letter-spacing:-.01em;line-height:1.25;
  text-shadow:0 1px 12px rgba(10,14,28,.6);}
.hm-wide .hm-corner .sb{font-size:12px;color:rgba(255,255,255,.82);margin-top:5px;
  text-shadow:0 1px 10px rgba(10,14,28,.6);}
.hm-wide .hm-foot{position:absolute;left:24px;right:24px;bottom:20px;z-index:4;
  font-size:12px;line-height:1.6;color:rgba(255,255,255,.9);text-shadow:0 1px 10px rgba(10,14,28,.55);}

/* 图片卡：媒体铺满 + 左上小标签 */
.hm-media{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.hm-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s cubic-bezier(.2,.7,.3,1);}
a.hm-cell:hover .hm-media img{transform:scale(1.03);}
.hm-b1{background:#1a1c22;}
.hm-b4{background:#3b4653;}
/* 顶部轻渐隐：让 b1 左上角白字产品名在浅色底图上也可读（b4 无文字，不再需要） */
.hm-b1::after{content:"";position:absolute;left:0;right:0;top:0;height:128px;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(12,18,34,.46),rgba(12,18,34,0));}
/* b1 另加底部渐隐：承载左下角说明文字（覆盖上一条的 height:128px 限制） */
.hm-b1::after{height:auto;bottom:0;
  background:linear-gradient(180deg,rgba(12,18,34,.5),rgba(12,18,34,0) 34%,rgba(12,18,34,0) 54%,rgba(12,18,34,.72));}
/* b1 左上角产品名/副标题 + 左下角说明（沿用原大图卡文案） */
.hm-b1 .hm-corner{position:absolute;top:20px;left:22px;right:22px;z-index:4;}
.hm-b1 .hm-corner .nm{font-size:15px;font-weight:700;color:#fff;letter-spacing:-.01em;text-shadow:0 1px 12px rgba(10,14,28,.55);}
.hm-b1 .hm-corner .sb{font-size:11px;color:rgba(255,255,255,.8);margin-top:4px;text-shadow:0 1px 10px rgba(10,14,28,.6);}
.hm-b1 .hm-foot{position:absolute;left:22px;right:22px;bottom:20px;z-index:4;font-size:11.5px;line-height:1.7;
  color:rgba(255,255,255,.9);text-shadow:0 1px 10px rgba(10,14,28,.6);}

/* 技术参数卡 */
.hm-b2{background:#fff;border:1px solid var(--hm-line);padding:30px 28px;display:flex;flex-direction:column;justify-content:space-between;}
.hm-b2 .k{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#b0b0b6;font-weight:700;}
.hm-b2 .big{font-size:clamp(22px,2.1vw,30px);font-weight:800;color:var(--hm-ink);letter-spacing:-.035em;line-height:1.15;}
.hm-b2 .k+.big{margin-top:12px;}
.hm-b2 .lbl{font-size:12.5px;color:#9a9aa1;margin-top:8px;}

/* 双数据小卡 + 半身机器人图 */
.hm-b3{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:minmax(0,1fr) minmax(0,1.02fr);gap:14px;}
.hm-tile{background:#fff;border:1px solid var(--hm-line);border-radius:var(--hm-r);padding:20px 14px;
  display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;overflow:hidden;}
/* 仅保留「时长 + 动作」：时长为大字数值，动作为小字说明，整卡垂直居中 */
.hm-tile .mt{display:flex;flex-direction:column;align-items:center;gap:8px;}
.hm-tile .mt .mv{font-size:clamp(22px,1.9vw,30px);font-weight:800;color:var(--hm-ink);letter-spacing:-.04em;line-height:1.05;}
.hm-tile .mt .ml{font-size:12.5px;font-weight:600;color:#8a8a92;letter-spacing:.02em;line-height:1.4;}
.hm-b3img{position:relative;grid-column:span 2;border-radius:var(--hm-r);overflow:hidden;background:#dfe4ec;display:block;}
.hm-b3img .hm-media img{object-position:center 42%;}
.hm-b3img::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(12,18,34,0) 52%,rgba(12,18,34,.34) 100%);}

@media(max-width:1024px){
  .hm-bento{grid-template-columns:1fr 1fr;}
  .hm-wide{min-height:240px;height:240px;}
  .hm-b1{grid-column:span 2;min-height:340px;}
  .hm-b2,.hm-b3{min-height:300px;}
  .hm-b4{grid-column:span 2;min-height:260px;}
}

@media(max-width:1024px){
  /* 幻灯片图片改为「整块背景」：铺满导航 + 文字所在的整个首屏，不再单独占一行 */
  .hm-hero-inner{display:block;}
  .hm-hero-right{position:absolute;inset:0;z-index:1;min-height:0;}
  .hm-hero-right::before{display:none;}
  /* 竖向渐隐：顶部用底色压住导航与文字区，向下逐渐透出图片 */
  .hm-hero-right::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
    background:linear-gradient(180deg,rgba(236,237,237,.96) 0%,rgba(236,237,237,.92) 18%,
      rgba(236,237,237,.76) 32%,rgba(236,237,237,.36) 48%,rgba(236,237,237,.08) 64%,rgba(236,237,237,0) 78%);}
  /* 源图主体偏右且偏下：右移裁切窗口 + 整体下移，避开标题文字区 */
  .hm-hero-right img{max-height:none;height:100%;object-position:72% center;transform:translateY(20%);}
  /* 文字压在图片上，补一层白色光晕保证可读性 */
  .hm-hero-left .hm-mark,.hm-hero-left .hm-eyebrow,.hm-hero-left .hm-sub,.hm-hero-left .hm-desc{
    text-shadow:0 0 12px rgba(255,255,255,.95),0 0 4px rgba(255,255,255,.95),0 0 2px rgba(255,255,255,1);}
  .hm-hero-grid{min-height:min(86vh,700px);padding:0 24px;}
  .hm-hero-left{padding:112px 0 80px;max-width:none;}
  .hm-h1{font-size:52px;}
  .is-en .hm-h1{font-size:40px;}
  /* 箭头缩小并下移，避免压住标题 */
  .hm-arrow{width:36px;height:36px;top:auto;bottom:18px;transform:none;}
  .hm-arrow#slidePrev{left:24px!important;}
  .hm-arrow#slideNext{right:24px!important;}
  .hm-slide-nav{left:0;right:0;margin:0 auto;width:max-content;bottom:32px;}
  .hm-slide-nav{left:24px;bottom:26px;}
}
@media(max-width:640px){
  /* 首屏高度收紧：底部不再留大段空白（原 88vh/700px → 64vh/560px） */
  .hm-hero-grid{padding:0 20px;min-height:min(64vh,560px);}
  .hm-hero-left{padding:92px 0 46px;}
  /* 窄屏下 clamp 的 vw 分量过小，单独放大标题 */
  .hm-h1{font-size:38px;}
  .is-en .hm-h1{font-size:30px;}
  .hm-hero-right{position:absolute;inset:0;min-height:0;}
  /* 主图整体上移至导航下沿，视觉上「背景图覆盖到导航」 */
  .hm-hero-right img{max-height:none;aspect-ratio:auto;object-position:74% center;transform:translateY(0);}
  /* 顶部渐隐减弱：图片从导航处即透出，不再被底色压住（文字区再补一层柔化保证可读） */
  .hm-hero-right::after{background:linear-gradient(180deg,rgba(236,237,237,.86) 0%,
    rgba(236,237,237,.78) 16%,rgba(236,237,237,.66) 32%,rgba(236,237,237,.4) 50%,
    rgba(236,237,237,.10) 66%,rgba(236,237,237,0) 80%);}
  .hm-manifesto{padding:64px 0 56px;}
  .hm-bento-sec{padding-bottom:64px;}
  .hm-bento{grid-template-columns:1fr;gap:10px;}
  .hm-wide{grid-column:1/-1;min-height:200px;height:200px;}
  .hm-wide .hm-corner{top:16px;left:16px;right:16px;}
  .hm-wide .hm-corner .nm{font-size:15px;}
  .hm-wide .hm-corner .sb{font-size:11px;}
  .hm-wide .hm-foot{left:16px;right:16px;bottom:16px;font-size:11px;}
  .hm-b1{grid-column:auto;min-height:250px;}
  .hm-b2{min-height:0;padding:24px 22px;}
  .hm-b3{min-height:0;gap:10px;}
  .hm-b3img{min-height:200px;}
  .hm-b4{grid-column:auto;min-height:320px;}
  .hm-stats{margin-top:30px;gap:10px;}
  .hm-stat{flex:1 1 40%;min-width:0;padding:13px 15px;}
}